Imports
27.2. Exact Matrix Costs — Execution Equalities (legacy compatibility path)
Third-edition-numbered compatibility path for this module. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_26.Section_26_2_4_Algorithms.ParallelMatrix.Costs.ExecutionEqualities;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).